| /* U3memcpy.S: UltraSparc-III optimized memcpy. |
| * |
| * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com) |
| */ |
| |
| #ifdef __KERNEL__ |
| #include <asm/visasm.h> |
| #include <asm/asi.h> |
| #define GLOBAL_SPARE %g7 |
| #else |
| #define ASI_BLK_P 0xf0 |
| #define FPRS_FEF 0x04 |
| #ifdef MEMCPY_DEBUG |
| #define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs; \ |
| clr %g1; clr %g2; clr %g3; subcc %g0, %g0, %g0; |
| #define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs |
| #else |
| #define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs |
| #define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs |
| #endif |
| #define GLOBAL_SPARE %g5 |
| #endif |
| |
| #ifndef EX_LD |
| #define EX_LD(x) x |
| #endif |
| #ifndef EX_LD_FP |
| #define EX_LD_FP(x) x |
| #endif |
| |
| #ifndef EX_ST |
| #define EX_ST(x) x |
| #endif |
| #ifndef EX_ST_FP |
| #define EX_ST_FP(x) x |
| #endif |
| |
| #ifndef EX_RETVAL |
| #define EX_RETVAL(x) x |
| #endif |
| |
| #ifndef LOAD |
| #define LOAD(type,addr,dest) type [addr], dest |
| #endif |
| |
| #ifndef STORE |
| #define STORE(type,src,addr) type src, [addr] |
| #endif |
| |
| #ifndef STORE_BLK |
| #define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_P |
| #endif |
| |
| #ifndef FUNC_NAME |
| #define FUNC_NAME U3memcpy |
| #endif |
| |
| #ifndef PREAMBLE |
| #define PREAMBLE |
| #endif |
| |
| #ifndef XCC |
| #define XCC xcc |
| #endif |
| |
| .register %g2,#scratch |
| .register %g3,#scratch |
| |
| /* Special/non-trivial issues of this code: |
| * |
| * 1) %o5 is preserved from VISEntryHalf to VISExitHalf |
| * 2) Only low 32 FPU registers are used so that only the |
| * lower half of the FPU register set is dirtied by this |
| * code. This is especially important in the kernel. |
| * 3) This code never prefetches cachelines past the end |
| * of the source buffer. |
| */ |
| |
| .text |
| .align 64 |
| |
| /* The cheetah's flexible spine, oversized liver, enlarged heart, |
| * slender muscular body, and claws make it the swiftest hunter |
| * in Africa and the fastest animal on land. Can reach speeds |
| * of up to 2.4GB per second. |
| */ |
| |
| .globl FUNC_NAME |
| .type FUNC_NAME,#function |
| FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */ |
| srlx %o2, 31, %g2 |
| cmp %g2, 0 |
| tne %xcc, 5 |
| PREAMBLE |
| mov %o0, %o4 |
| cmp %o2, 0 |
| be,pn %XCC, 85f |
| or %o0, %o1, %o3 |
| cmp %o2, 16 |
| blu,a,pn %XCC, 80f |
| or %o3, %o2, %o3 |
| |
| cmp %o2, (3 * 64) |
| blu,pt %XCC, 70f |
| andcc %o3, 0x7, %g0 |
| |
| /* Clobbers o5/g1/g2/g3/g7/icc/xcc. We must preserve |
| * o5 from here until we hit VISExitHalf. |
| */ |
| VISEntryHalf |
| |
| /* Is 'dst' already aligned on an 64-byte boundary? */ |
| andcc %o0, 0x3f, %g2 |
| be,pt %XCC, 2f |
| |
| /* Compute abs((dst & 0x3f) - 0x40) into %g2. This is the number |
| * of bytes to copy to make 'dst' 64-byte aligned. We pre- |
| * subtract this from 'len'. |
| */ |
| sub %o0, %o1, GLOBAL_SPARE |
| sub %g2, 0x40, %g2 |
| sub %g0, %g2, %g2 |
| sub %o2, %g2, %o2 |
| andcc %g2, 0x7, %g1 |
| be,pt %icc, 2f |
| and %g2, 0x38, %g2 |
| |
| 1: subcc %g1, 0x1, %g1 |
| EX_LD_FP(LOAD(ldub, %o1 + 0x00, %o3)) |
| EX_ST_FP(STORE(stb, %o3, %o1 + GLOBAL_SPARE)) |
| bgu,pt %XCC, 1b |
| add %o1, 0x1, %o1 |
| |
| add %o1, GLOBAL_SPARE, %o0 |
| |
| 2: cmp %g2, 0x0 |
| and %o1, 0x7, %g1 |
| be,pt %icc, 3f |
| alignaddr %o1, %g0, %o1 |
| |
| EX_LD_FP(LOAD(ldd, %o1, %f4)) |
| 1: EX_LD_FP(LOAD(ldd, %o1 + 0x8, %f6)) |
| add %o1, 0x8, %o1 |
| subcc %g2, 0x8, %g2 |
| faligndata %f4, %f6, %f0 |
| EX_ST_FP(STORE(std, %f0, %o0)) |
| be,pn %icc, 3f |
| add %o0, 0x8, %o0 |
| |
| EX_LD_FP(LOAD(ldd, %o1 + 0x8, %f4)) |
| add %o1, 0x8, %o1 |
| subcc %g2, 0x8, %g2 |
| faligndata %f6, %f4, %f2 |
| EX_ST_FP(STORE(std, %f2, %o0)) |
| bne,pt %icc, 1b |
| add %o0, 0x8, %o0 |
| |
| 3: LOAD(prefetch, %o1 + 0x000, #one_read) |
| LOAD(prefetch, %o1 + 0x040, #one_read) |
| andn %o2, (0x40 - 1), GLOBAL_SPARE |
| LOAD(prefetch, %o1 + 0x080, #one_read) |
| LOAD(prefetch, %o1 + 0x0c0, #one_read) |
| LOAD(prefetch, %o1 + 0x100, #one_read) |
| EX_LD_FP(LOAD(ldd, %o1 + 0x000, %f0)) |
| LOAD(prefetch, %o1 + 0x140, #one_read) |
| EX_LD_FP(LOAD(ldd, %o1 + 0x008, %f2)) |
| LOAD(prefetch, %o1 + 0x180, #one_read) |
| EX_LD_FP(LOAD(ldd, %o1 + 0x010, %f4)) |
| LOAD(prefetch, %o1 + 0x1c0, #one_read) |
| faligndata %f0, %f2, %f16 |
| EX_LD_FP(LOAD(ldd, %o1 + 0x018, %f6)) |
| faligndata %f2, %f4, %f18 |
| EX_LD_FP(LOAD(ldd, %o1 + 0x020, %f8)) |
| faligndata %f4, %f6, %f20 |
| EX_LD_FP(LOAD(ldd, %o1 + 0x028, %f10)) |
| faligndata %f6, %f8, %f22 |
| |
| EX_LD_FP(LOAD(ldd, %o1 + 0x030, %f12)) |
| faligndata %f8, %f10, %f24 |
| EX_LD_FP(LOAD(ldd, %o1 + 0x038, %f14)) |
| faligndata %f10, %f12, %f26 |
| EX_LD_FP(LOAD(ldd, %o1 + 0x040, %f0)) |
| |
| subcc GLOBAL_SPARE, 0x80, GLOBAL_SPARE |
| add %o1, 0x40, %o1 |
| bgu,pt %XCC, 1f |
| srl GLOBAL_SPARE, 6, %o3 |
| ba,pt %xcc, 2f |
| nop |
| |
| .align 64 |
| 1: |
| EX_LD_FP(LOAD(ldd, %o1 + 0x008, %f2)) |
| faligndata %f12, %f14, %f28 |
| EX_LD_FP(LOAD(ldd, %o1 + 0x010, %f4)) |
| faligndata %f14, %f0, %f30 |
| EX_ST_FP(STORE_BLK(%f16, %o0)) |
| EX_LD_FP(LOAD(ldd, %o1 + 0x018, %f6)) |
| faligndata %f0, %f2, %f16 |
| add %o0, 0x40, %o0 |
| |
| EX_LD_FP(LOAD(ldd, %o1 + 0x020, %f8)) |
| faligndata %f2, %f4, %f18 |
| EX_LD_FP(LOAD(ldd, %o1 + 0x028, %f10)) |
| faligndata %f4, %f6, %f20 |
| EX_LD_FP(LOAD(ldd, %o1 + 0x030, %f12)) |
| subcc %o3, 0x01, %o3 |
| faligndata %f6, %f8, %f22 |
| EX_LD_FP(LOAD(ldd, %o1 + 0x038, %f14)) |
| |
| faligndata %f8, %f10, %f24 |
| EX_LD_FP(LOAD(ldd, %o1 + 0x040, %f0)) |
| LOAD(prefetch, %o1 + 0x1c0, #one_read) |
| faligndata %f10, %f12, %f26 |
| bg,pt %XCC, 1b |
| add %o1, 0x40, %o1 |
| |
| /* Finally we copy the last full 64-byte block. */ |
| 2: |
| EX_LD_FP(LOAD(ldd, %o1 + 0x008, %f2)) |
| faligndata %f12, %f14, %f28 |
| EX_LD_FP(LOAD(ldd, %o1 + 0x010, %f4)) |
| faligndata %f14, %f0, %f30 |
| EX_ST_FP(STORE_BLK(%f16, %o0)) |
| EX_LD_FP(LOAD(ldd, %o1 + 0x018, %f6)) |
| faligndata %f0, %f2, %f16 |
| EX_LD_FP(LOAD(ldd, %o1 + 0x020, %f8)) |
| faligndata %f2, %f4, %f18 |
| EX_LD_FP(LOAD(ldd, %o1 + 0x028, %f10)) |
| faligndata %f4, %f6, %f20 |
| EX_LD_FP(LOAD(ldd, %o1 + 0x030, %f12)) |
| faligndata %f6, %f8, %f22 |
| EX_LD_FP(LOAD(ldd, %o1 + 0x038, %f14)) |
| faligndata %f8, %f10, %f24 |
| cmp %g1, 0 |
| be,pt %XCC, 1f |
| add %o0, 0x40, %o0 |
| EX_LD_FP(LOAD(ldd, %o1 + 0x040, %f0)) |
| 1: faligndata %f10, %f12, %f26 |
| faligndata %f12, %f14, %f28 |
| faligndata %f14, %f0, %f30 |
| EX_ST_FP(STORE_BLK(%f16, %o0)) |
| add %o0, 0x40, %o0 |
| add %o1, 0x40, %o1 |
| membar #Sync |
| |
| /* Now we copy the (len modulo 64) bytes at the end. |
| * Note how we borrow the %f0 loaded above. |
| * |
| * Also notice how this code is careful not to perform a |
| * load past the end of the src buffer. |
| */ |
| and %o2, 0x3f, %o2 |
| andcc %o2, 0x38, %g2 |
| be,pn %XCC, 2f |
| subcc %g2, 0x8, %g2 |
| be,pn %XCC, 2f |
| cmp %g1, 0 |
| |
| sub %o2, %g2, %o2 |
| be,a,pt %XCC, 1f |
| EX_LD_FP(LOAD(ldd, %o1 + 0x00, %f0)) |
| |
| 1: EX_LD_FP(LOAD(ldd, %o1 + 0x08, %f2)) |
| add %o1, 0x8, %o1 |
| subcc %g2, 0x8, %g2 |
| faligndata %f0, %f2, %f8 |
| EX_ST_FP(STORE(std, %f8, %o0)) |
| be,pn %XCC, 2f |
| add %o0, 0x8, %o0 |
| EX_LD_FP(LOAD(ldd, %o1 + 0x08, %f0)) |
| add %o1, 0x8, %o1 |
| subcc %g2, 0x8, %g2 |
| faligndata %f2, %f0, %f8 |
| EX_ST_FP(STORE(std, %f8, %o0)) |
| bne,pn %XCC, 1b |
| add %o0, 0x8, %o0 |
| |
| /* If anything is left, we copy it one byte at a time. |
| * Note that %g1 is (src & 0x3) saved above before the |
| * alignaddr was performed. |
| */ |
| 2: |
| cmp %o2, 0 |
| add %o1, %g1, %o1 |
| VISExitHalf |
| be,pn %XCC, 85f |
| sub %o0, %o1, %o3 |
| |
| andcc %g1, 0x7, %g0 |
| bne,pn %icc, 90f |
| andcc %o2, 0x8, %g0 |
| be,pt %icc, 1f |
| nop |
| EX_LD(LOAD(ldx, %o1, %o5)) |
| EX_ST(STORE(stx, %o5, %o1 + %o3)) |
| add %o1, 0x8, %o1 |
| |
| 1: andcc %o2, 0x4, %g0 |
| be,pt %icc, 1f |
| nop |
| EX_LD(LOAD(lduw, %o1, %o5)) |
| EX_ST(STORE(stw, %o5, %o1 + %o3)) |
| add %o1, 0x4, %o1 |
| |
| 1: andcc %o2, 0x2, %g0 |
| be,pt %icc, 1f |
| nop |
| EX_LD(LOAD(lduh, %o1, %o5)) |
| EX_ST(STORE(sth, %o5, %o1 + %o3)) |
| add %o1, 0x2, %o1 |
| |
| 1: andcc %o2, 0x1, %g0 |
| be,pt %icc, 85f |
| nop |
| EX_LD(LOAD(ldub, %o1, %o5)) |
| ba,pt %xcc, 85f |
| EX_ST(STORE(stb, %o5, %o1 + %o3)) |
| |
| .align 64 |
| 70: /* 16 < len <= 64 */ |
| bne,pn %XCC, 75f |
| sub %o0, %o1, %o3 |
| |
| 72: |
| andn %o2, 0xf, GLOBAL_SPARE |
| and %o2, 0xf, %o2 |
| 1: subcc GLOBAL_SPARE, 0x10, GLOBAL_SPARE |
| EX_LD(LOAD(ldx, %o1 + 0x00, %o5)) |
| EX_LD(LOAD(ldx, %o1 + 0x08, %g1)) |
| EX_ST(STORE(stx, %o5, %o1 + %o3)) |
| add %o1, 0x8, %o1 |
| EX_ST(STORE(stx, %g1, %o1 + %o3)) |
| bgu,pt %XCC, 1b |
| add %o1, 0x8, %o1 |
| 73: andcc %o2, 0x8, %g0 |
| be,pt %XCC, 1f |
| nop |
| sub %o2, 0x8, %o2 |
| EX_LD(LOAD(ldx, %o1, %o5)) |
| EX_ST(STORE(stx, %o5, %o1 + %o3)) |
| add %o1, 0x8, %o1 |
| 1: andcc %o2, 0x4, %g0 |
| be,pt %XCC, 1f |
| nop |
| sub %o2, 0x4, %o2 |
| EX_LD(LOAD(lduw, %o1, %o5)) |
| EX_ST(STORE(stw, %o5, %o1 + %o3)) |
| add %o1, 0x4, %o1 |
| 1: cmp %o2, 0 |
| be,pt %XCC, 85f |
| nop |
| ba,pt %xcc, 90f |
| nop |
| |
| 75: |
| andcc %o0, 0x7, %g1 |
| sub %g1, 0x8, %g1 |
| be,pn %icc, 2f |
| sub %g0, %g1, %g1 |
| sub %o2, %g1, %o2 |
| |
| 1: subcc %g1, 1, %g1 |
| EX_LD(LOAD(ldub, %o1, %o5)) |
| EX_ST(STORE(stb, %o5, %o1 + %o3)) |
| bgu,pt %icc, 1b |
| add %o1, 1, %o1 |
| |
| 2: add %o1, %o3, %o0 |
| andcc %o1, 0x7, %g1 |
| bne,pt %icc, 8f |
| sll %g1, 3, %g1 |
| |
| cmp %o2, 16 |
| bgeu,pt %icc, 72b |
| nop |
| ba,a,pt %xcc, 73b |
| |
| 8: mov 64, %o3 |
| andn %o1, 0x7, %o1 |
| EX_LD(LOAD(ldx, %o1, %g2)) |
| sub %o3, %g1, %o3 |
| andn %o2, 0x7, GLOBAL_SPARE |
| sllx %g2, %g1, %g2 |
| 1: EX_LD(LOAD(ldx, %o1 + 0x8, %g3)) |
| subcc GLOBAL_SPARE, 0x8, GLOBAL_SPARE |
| add %o1, 0x8, %o1 |
| srlx %g3, %o3, %o5 |
| or %o5, %g2, %o5 |
| EX_ST(STORE(stx, %o5, %o0)) |
| add %o0, 0x8, %o0 |
| bgu,pt %icc, 1b |
| sllx %g3, %g1, %g2 |
| |
| srl %g1, 3, %g1 |
| andcc %o2, 0x7, %o2 |
| be,pn %icc, 85f |
| add %o1, %g1, %o1 |
| ba,pt %xcc, 90f |
| sub %o0, %o1, %o3 |
| |
| .align 64 |
| 80: /* 0 < len <= 16 */ |
| andcc %o3, 0x3, %g0 |
| bne,pn %XCC, 90f |
| sub %o0, %o1, %o3 |
| |
| 1: |
| subcc %o2, 4, %o2 |
| EX_LD(LOAD(lduw, %o1, %g1)) |
| EX_ST(STORE(stw, %g1, %o1 + %o3)) |
| bgu,pt %XCC, 1b |
| add %o1, 4, %o1 |
| |
| 85: retl |
| mov EX_RETVAL(%o4), %o0 |
| |
| .align 32 |
| 90: |
| subcc %o2, 1, %o2 |
| EX_LD(LOAD(ldub, %o1, %g1)) |
| EX_ST(STORE(stb, %g1, %o1 + %o3)) |
| bgu,pt %XCC, 90b |
| add %o1, 1, %o1 |
| retl |
| mov EX_RETVAL(%o4), %o0 |
| |
| .size FUNC_NAME, .-FUNC_NAME |
